Vamvakeros, A;
Matras, D;
Jacques, SDM;
di Michiel, M;
Price, SWT;
Senecal, P;
Aran, MA;
... Beale, AM; + view all
(2020)
Real-time multi-length scale chemical tomography of fixed bed reactors during the oxidative coupling of methane reaction.
Journal of Catalysis
, 386
pp. 39-52.
10.1016/j.jcat.2020.03.027.
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Beale_Manuscript_revised.pdf - Accepted version Access restricted to UCL open access staff until 19 April 2021. Download (2MB) |
Abstract
In this work, we present the results from multi-length-scale studies of a Mn-Na-W/SiO2 and a La-promoted Mn-Na-W/SiO2 catalyst during the oxidative coupling of methane reaction. The catalysts were investigated from the reactor level (mm scale) down to the single catalyst particle level (μm scale) with different synchrotron X-ray chemical computed tomography techniques (multi-modal chemical CT experiments). These operando spatially-resolved studies performed with XRD-CT (catalytic reactor) and multi-modal μ-XRF/XRD/absorption CT (single catalyst particle) revealed the multiple roles of the La promoter and how it provides the enhancement in catalyst performance. It is also shown that non-crystalline Mn species are part of the active catalyst component rather than crystalline Mn2O3/Mn7SiO12 or MnWO4.
| Type: | Article |
|---|---|
| Title: | Real-time multi-length scale chemical tomography of fixed bed reactors during the oxidative coupling of methane reaction |
| DOI: | 10.1016/j.jcat.2020.03.027 |
| Publisher version: | https://doi.org/10.1016/j.jcat.2020.03.027 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Imaging, Xrd, Operando, Catalyst, Xrf, Micro, In situ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10095656 |
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